Is there a way to design only a few members in RAM Elements? In my case, I imported floor framing from RAM Structure System into Elements in order to determine chord and collector forces. Consequently, I still have all the gravity members in the model…

In RAM Frame, when assigning the load percentages for Pseudo Flexible diaphragms it will not recognize a frame number if that frame does not have a column in a particular diaphragm. Can we either get an enhancement to assign a column to multiple frames…

I have a question about removing/detaching diaphragm nodes on RAM ELEMENTS and how it behaves. I want to remove/detach areas of the main diaphragm (slab being demolished). If I want to do that, do I need to create new nodes at the perimeter of the removed…

Hello The Diaphragm shear stiffness formula has changed based on the AISI 310-16 and this results in a much higher shear stiffness. Following the procedure suggested by RAM Calculating Semirigid Diaphragm E'... this results in a E' value that is 3-4x…

Hi, I have created a section with section wizard by using plate elements in section builder as attached. i have exported to staad.pro with Prismatic option. Its not getting design with the Euro code and it showing the warning message as * DESIGN NOT…

I am working on a structure that has a flooring system of 3/4" concrete board spanning between cold-form metal joists at 16" O.C. The joists span up to 20' between wide-flange moment and braced frames. In an effort to simplify the modeling for this multi…

Bentley/RAM's website recommends using the deck gage thickness as the deck's effective shear thickness. However, the deck's attachment design, lapping, etc have a large effect on the deck's effective shear thickness and can dramatically change the building…

Currently my 3 story RAM structural system model is calculating loads differently for each story when the roof diaphragm is switched from pseudo flexible to semi rigid. Additionally, when the roof diaphragm is semi-rigid, the load is applied to the perimeter…

Lately I've been running into issues with my lateral analysis on a large, square steel framed building. The roof is an 1-1/2" metal deck that slopes in one direction and drops 10' over the length of the building, which I've modeled as a semirigid diaphragm…

Hi, I'm trying to verify the drift of a one-story ware house with tilt-up concrete panels and steel deck roof. I followed all the information that I found on the forum, but I still have a few questions: First I calculated the properties and displacement…

May anyone please guide how to apply diaphragm command in line with above mention clause? any special command in Staad-pro to take care of this check.

When I apply diaphragm to the structure I don't know why it is showing JOINT ?? What's the solution of this. Because of this I am getting error in analysis

steel quantities especially column size get reduce while considering the rigidity of RCC floor into account. what shall be right approach to consider its effect.

Hello, When running my model, the message below appeared on my screen. It warned me that an instability was found at a rigid diaphragm defined in my model for RZ. It told me to check the elements attached to this diaphragm or check PDelta Effects…

Could anyone please guide me on the properties that I should input for semi-rigid diaphragm in RAM Structural system, in the decking properties for the Laminated Lockwood wood deck? Effective thickness (in) - ______ Poisson's Ratio - ___________ …

Hello, I have a roof with a composite deck over half of the floor plan. The other half is just the metal deck. I have the model working for gravity and I do not get any errors when I run the lateral model, however I have a feeling that there is something…

I have a building that is mostly two stories with a connected one story area; the two areas are structurally connected so it is preferred that they are modeled together.The one story area has a sloped roof. When I try to slope the roof of the one story…

The newest version of RAM SS 15.05 now has unique stiffness modification factors for each deck direction for materials such as corrugated roof deck. However, I haven't found diagram, or example explaining what the factors "f11", "f22", "f12", "m11", …